The reason is probably that they are old and obsolete, and the places we source them from don’t have them anymore. Remember: When the CMS deprecates a HCPCS code it will eradicate it from the website, so no dummy will still use it accidentally. We have been discussing this very subject here
and here
So, can you please create google document with those 700 concepts, and put the link here. And we can add the concepts then.
the format of the file:
code, description, vocabulary_id, earliest observation, latest observation